.App-intro{width:300px;height:200px;border:1px solid #ddd;color:red}
.warning{
  background: red;
  padding:10px;
  text-align: center;
  color:#fff;
  display: inline-block;
}
.safe{
  background: green;
  padding:10px;
  text-align: center;
  color:#fff;
  display: inline-block;
}
